import { asyncRoutes, constantRoutes } from '@/router'
import Layout from '@/layout'

/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []
  console.info('routes', routes)
  routes.forEach(route => {
    const tmp = { ...route }
    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        console.info('tmp.children', tmp.children)
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}

export const filterAsyncRouter = (routers) => { // 遍历后台传来的路由字符串，转换为组件对象
  const accessedRouters = routers.filter(router => {
    if (router.component) {
      // if (router.component === 'Layout') { // Layout组件特殊处理
      //   router.component = Layout
      // } else {
      const component = router.component
      router.component = loadView(component)
      // }
    }
    if (router.children && router.children.length) {
      router.children = filterAsyncRouter(router.children)
    }
    return true
  })
  return accessedRouters
}

export const loadView = (view) => { // 路由懒加载
  if (view === 'layout') {
    console.info('layout')
    return Layout
  }
  return (resolve) => require([`@/views/${view}`], resolve)
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  generateRoutes({ commit }, roles) {
    return new Promise(resolve => {
      // let accessedRoutes
      // if (roles.includes('admin')) {
      //   accessedRoutes = asyncRoutes || []
      // } else {
      //   accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
      // }
      // commit('SET_ROUTES', accessedRoutes)
      // resolve(accessedRoutes)

      // const { detail } = response
      const detail = [{
        path: '/user-table',
        component: 'layout',
        children: [
          {
            path: 'index',
            component: 'power/user-table.vue',
            name: '用户设置',
            meta: { title: '用户设置', icon: 'documentation', affix: false }
          }
        ]
      }]
      console.log(roles)
      const asyncRouter = filterAsyncRouter(detail)
      console.log(asyncRouter)
      commit('SET_ROUTES', asyncRouter)
      resolve(asyncRouter)
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
